Cathay Pacific Pipeline Equipment Co., Ltd. Hebei (www.hbgtgd.com) is located in Cangzhou, Hebei Cangzhou Cang Yanshan Wuliyao Hing Road Industrial Area, Contact: Liu Ping welding and butt welding flange means and pipe connection, the intraoral welding neck flange welded flange welding parameters only one side welding without welding pipes and flanged, welded flange welding flange installation requires two-sided welding. So generally used for low-welded flange, welding neck flange with standard pressure pipes, welded flange is used, the connection flange welded pressure pipe is generally at least PN2.5MPa, using the butt is In order to reduce stress concentration weld neck flange dealers, mostly general welded flange with neck flange also called nipple flange. So welded flange mounting costs, labor costs and auxiliary fees are high, because more than one process. Weld Neck Falan Song sets loose ring flange welded ring loose flange welded ring set with a neck Loose plate flange weld ring Loose plate flange loose flange plate over the device after another in order to meet locking needs, there is a hole in the stem portion of these holes can be affected by vibrations when the bolt is not to loose. did some flange bolts threaded rod to be meticulous, called thin rod flange bolts. Such flange bolts subject to change in favor of the force coupling. has a dedicated high-strength bolts on the steel. head will become bigger and more. sizes also vary galvanized steel bar is molten matrix metal and iron alloy layer reaction. Flange Standard: HG20592-2009 (PN series) \ HG20615-2009 (Calss Series)